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WorksheetsMechanics of Respiration
Total questions: 9
Worksheet time: 5mins
How are the lungs kept open?
Effect of individual's height
Dimension of thoracic cavity
Pressure difference between lung and pleura
Volume of air entered lung
[MCQ] Which of the following is directly involved in ventilation?
Intrapleural pressure
Partial pressure of oxygen
Acidity of expired air
Intra-alveolar pressure
In spontaneous pneumothorax, the lung collapsed due to
Elastic recoil of lung
Higher resistance in airway
Reduced lung stability
Increased intra-alveolar pressure
During inspiration, which combination best describes the pressure changes in lung.
Palv = PIP
Palv<Patm
Palv>Patm
PIP>Palv
In patients with below neck paralysis, will they have breathing difficulty?
Yes
No
Shahril slept late last night. Now, he felt tired and yawn with his mouth wide open during physiology lecture. When he yawn, he felt more air entered his chest. Which of the following BEST describes the cause of increase in air flow into the lungs.
Reduced airway resistance
Increased in lung volume
Increased sympathetic stimulation
Increased force of external intercoastal muscle contraction
Sharlene has an allergy to pollen. She went to meet her friend, Amir where he gave her some flowers to hold. Within 5 minutes, Sharleen started to sneeze. Which muscles were involved in sneezing?
Contraction of diaphragm
Relaxation of epiglottis
Contraction of external oblique muscle
Relaxation of pectoralis minor
When sneezing, Sharleen’s intrapleural pressure exceeded the atmospheric pressure. Sharlene’s experienced sudden onset of breathlessness. Amir, who happened to be a doctor thinks that Sharleen’s alveolar has collapsed. Under normal conditions, which of the following statements protects Sharleen from alveolar collapse?
The atmospheric pressure is always positive.
The diaphragm activity controls the lung pressures.
The alveolar surfactant reduces the intrapleural pressure.
The intra-alveolar pressure increased with intrapleural fluid contraction.
A COPD patient presented to the outpatient clinic for follow up appointment. He appears short of breath and reported having more difficulty in expiring than inspiration. Which option best describe the mechanism of difficulty in expiration?
Dynamic airway compression
Increased airway resistance
Destruction of airway cartilage
Expiratory muscle fatigability
